/*
 * Copyright (c) 2009, 2011, okazoh_tk. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  - Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "alkes/media/ImageBufferFactory.h"
#include "alkes/media/HeapImageBuffer.h"

namespace alkes {

ImageBufferFactory* ImageBufferFactory::create()
{
    return new ImageBufferFactory();
}

void ImageBufferFactory::destroy()
{
    delete this;
}

ImageBufferFactory::ImageBufferFactory()
{
}

ImageBufferFactory::~ImageBufferFactory()
{
}

ImageBuffer* ImageBufferFactory::createImageBuffer(uint16_t width, uint16_t height, PixelFormat format, bool write_only)
{
    return HeapImageBuffer::create(width, height, format, write_only);
}

ImageBuffer* ImageBufferFactory::cloneImageBuffer(ImageBuffer* src)
{
    return cloneImageBuffer(src, src->getImageRect());
}

ImageBuffer* ImageBufferFactory::cloneImageBuffer(ImageBuffer* src, const Rect& rect)
{
    if (!src || !src->isReadable())
        return 0;

    PixelFormat src_format = src->getPixelFormat();
    PixelFormat format = getCompatibleFormat(src_format);

    ImageBuffer* dst = createImageBuffer(rect.width, rect.height, format);
    if (!dst)
        return 0;

    if (!dst->copyFrom(src, &rect))
    {
        dst->release();
        dst = 0;
    }

    return dst;
}

PixelFormat ImageBufferFactory::getCompatibleFormat(PixelFormat format) const
{
    switch (format)
    {
    case AL_PIXEL_FORMAT_EXT_BGRA8888:
        format = AL_PIXEL_FORMAT_RGBA8888;
        break;
    case AL_PIXEL_FORMAT_EXT_BGR888:
        format = AL_PIXEL_FORMAT_RGB888;
        break;
    default:
        break;
    }
    return format;
}

}
